4,4′-Diamino-2,2′-stilbenedisulfonic acid CAS 81-11-8

CAS: 81-11-8

Molecular Formula: C14H14N2O6S2

Molecular Weight: 370.4

EINECS: 201-325-2

Synonyms: diaminostilbenedisulfonicacid; 4,4'-Diaminodiphenylethylene-2,2'-disulfonic acid'; 4',4" Diamino stillbene 2'2" disulphonic acid; 1,2-bis(4-amino-2-sulfophenyl)ethene; 4,4'-Diamino-2,2'-stibenedisulfonic acid; 4,4'-DIAMINO-2,2'-STILBENEDISULFONIC ACI D, TECH,85%; 2,2’-(1,2-ethenediyl)bis[5-amino-benzenesulfonicaci; 2,2’-(1,2-ethenediyl)bis[5-amino-Benzenesulfonicacid; 2,2’-(1,2-ethenediyl)bis[5-amino-benzenesulfonicacid]

Leave Your Message

Product Detail

Download

Product Tags

What is 4,4'-Diamino-2,2'-stilbenedisulfonic acid CAS 81-11-8?

4,4 '- diaminodiphenyl-2,2' - disulfonic acid belongs to the class of stilbene compounds and can be prepared by hydrogenation of its nitro substituted precursor compounds. 4,4 '- Diamino-2,2' - stilbenedisilfonic acid is a yellow needle shaped hygroscopic crystal. Very slightly soluble in water, soluble in ethanol and ether, easily soluble in alkaline solutions.

Specification

Item	Specification
pKa	-1.58±0.50(Predicted)
Melting point	300 °C
Density	1.4732 (rough estimate)
Vapor pressure	1.3hPa at 25℃
SOLUBLE	<0.1 g/100 mL at 23 ºC
Refractivity	1.6510 (estimate)

Application

4,4 '- Diamino-2,2' - stilbenedisilfonic acid dye and intermediate such as fluorescent whitening agent. 4,4 '- Diamino-2,2' - stilbenedisilfonic acid is used to produce fluorescent whitening agent, direct frozen yellow G and direct yellow R, and as insecticide